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Tire information
mended by a vehicle manufacturer .
. Reinforced tire A tire designed to operate at higher loads and at higher inflation pressures than the corresponding standard tire .
. Rim A metal support for a tire or a tire and tube assembly upon which the tire beads are seated .
. Rim diameter Nominal diameter of the bead seat .
. Rim size designation Rim diameter and width .
. Rim type designation The industry of manufacturer ’ s designation for a rim by style or code .
. Rim width Nominal distance between rim flanges .
. Section width The linear distance between the exteriors of the sidewalls of an inflated tire , excluding elevations due to labeling , decoration , or protective bands .
. Sidewall That portion of a tire between the tread and bead .
. Sidewall separation The parting of the rubber compound from the cord material in the sidewall .
. Snow tire A tire that attains a traction index equal to or greater than 110 , compared to the ASTM E-1136-93 Standard Reference Test Tire , when using the snow traction test as described in ASTM F-1805-00 , Standard Test Method for Single Wheel Driving Traction in a Straight Line on Snow-and Ice-Covered Surfaces , and that is marked with an Alpine Symbol “ ” on at least one sidewall .
. Test rim The rim on which a tire is fitted for testing , and it may be any rim listed as appropriate for use with that tire .
. Tread That portion of a tire that comes into contact with the road .
. Tread rib A tread section running circumferentially around a tire .
. Tread separation Pulling away of the tread from the tire carcass .
. Treadwear indicators ( TWI ) The projections within the principal grooves designed to give a visual indication of the degrees of wear of the tread .
. Vehicle capacity weight The rated cargo and luggage load plus 150 lbs ( 68 kg ) times the vehicle ’ s designated seating capacity .
. Vehicle maximum load on the tire Load on an individual tire that is determined by distributing to each axle its share of the maximum loaded vehicle weight and dividing by two .
. Vehicle normal load on the tire Load on an individual tire that is determined by distributing to each axle its share of the curb weight , accessory weight , and normal oc-